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Soursop fruit is legal in the UK: the EU Novel Food Catalogue records that the fruit was eaten in Europe to a significant degree before 15 May 1997, so it is not a novel food, and soursop nectar is listed by name in the retained fruit-nectar rules. The same catalogue entry, updated 27 May 2024, classes the seeds, fruit peel, leaves and roots as novel foods that need pre-market authorisation before sale as food in the EU. In Great Britain the Food Standards Agency treats the catalogue as an indicative reference, no soursop preparation holds a GB novel food authorisation, and the duty to verify novel status sits with the business selling the product. This guide explains what novel food means, which parts of soursop are novel, what that means for leaf tea, capsules and graviola supplements, the Northern Ireland position and what a shopper can check.
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Soursop is the fruit of Annona muricata; graviola, guanabana, guyabano and corossol are the same plant, and custard apple, cherimoya and sugar apple are relatives. The ripe pulp is an established food in the UK. The leaves are sold as tea, capsules and extracts, and that is where the evidence thins and the safety questions begin: no human trial has shown a health benefit from the leaves, soursop has no authorised health claim in Great Britain, and observational studies in the French Caribbean have linked long-term soursop consumption with an unusual form of parkinsonism. This hub covers the names, the plant parts, what has been tested in people, the tea question, the safety signal with its evidence grade, cancer, labels, legal status and who should be careful.
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A graviola label tells you less than it seems to. "13,500 mg equivalent" on a 450 mg capsule means 450 mg of extract made from 13,500 mg of raw plant, a 30:1 ratio; it is not 13,500 mg of anything in the capsule and not a measure of any active compound. The figures that matter are the botanical name, the plant part, the actual milligrams per daily portion, the extract ratio if there is one, and the warnings. In a review of 16 UK soursop supplement labels on 14 October 2026, 9 named the plant, 4 gave an extract ratio, none stated an acetogenin amount and one carried a neurological warning.
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No. Extracts of soursop leaves are toxic to cancer cells in laboratory dishes and have slowed tumours in some animal experiments, which is why the claim spread. In people, no clinical trial has measured whether soursop shrinks a tumour, delays recurrence or extends life: the human record is one randomised trial of 30 colorectal cancer patients that measured a laboratory marker, a non-randomised study of a combination product in 162 bladder cancer patients, two registered trials with no results, and surveys of use. Cancer Research UK's position, UK law on cancer advertising, and what to do if someone you love is taking it.
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Eaten occasionally as a fruit, soursop has no documented side effects beyond those of any fruit. The concerns attach to regular, long-term intake and to concentrated leaf products: an observational link with an unusual, levodopa-resistant parkinsonism in the French Caribbean; falls in blood pressure and blood sugar in animal studies that could add to the effect of medicines; no safety data in pregnancy or breastfeeding; and kidney and liver findings in animals that point both ways. Medicines in UK generic names, in NHS wording, and the groups who should not take leaf, tea, capsules or extracts without asking first.
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